Where is the origin of alarm clock?

In ancient China, there were sundials, water clocks, fire clocks, copper pot dripping and so on, which can only be regarded as ancient timers. No clock can be called a clock without ticking. In 19, Su Song, the prime minister of the Northern Song Dynasty, presided over the construction of a water transport instrument, which can tell the time and strike the clock. Its structure is similar to that of modern clocks and watches, and it can be called the originator of clocks and watches. There is only one second error every day. Moreover, it has an escapement, which can make a ticking sound when it works. This is the difference between a clock and a timer. The international watch industry regards escapement as the heart of watches. In Switzerland, an authoritative book in the world clock industry wrote: "The escapement used in modern mechanical clocks originated from the invention of ancient Su Song in China." In the Song Dynasty, Su Song, a scientist, invented the "celestial sphere instrument". In the book of Joseph Needham, a famous British historian of science and technology, it was recorded: "Su Song has been completely successful in principle since he combined the horological machinery with astronomical observation instruments. He was six centuries ahead of robert hooke. For example, he and Fei and Hooke were considered by the west as the inventors of astronomical clocks for seven and a half centuries." After the 12th century, China's watch technology was introduced to Europe, and only then did Europeans make watches. It can be said that China people started the history of human watches and influenced the progress of western watches.

In p>1283, the first mechanical clock driven by a weight appeared in a monastery in England.

In the 13th century, monks in northern Italy began to build bell towers (or bell towers) to remind people of the time of prayer.

in the 16th century, there began to be desk clocks in Germany. Those clocks have only one hand, and the clock face is divided into four parts, so that the time is accurate to the nearest 15 minutes.

in the 17th century, pendulums and laws gradually appeared. The accuracy of its operation has been greatly improved. Giovanni de Dante is known as the father of clocks in Europe. It took him 16 years to make a fully functional clock, called the cosmic armillary sphere, which can show the trajectories of some planets in the sky, and can also reflect religious festivals and the time of day. It began to be used in 1364. The clock made by Dante is not the first clock in Europe. It is said that the first clock that can tell the time in Europe was made in Milan in 1335.

in p>1657, huygens discovered that the frequency of pendulum can calculate time, and made the first pendulum clock. In 167, an Englishman, William Clement, invented the anchor escapement.

In p>1695, Tom Ping of England invented the I-wheel escapement. Later, Graham of the same country invented the static escapement.

from p>1728 to 1759, the nautical clock came out.

in p>1765, the free anchor escapement was born.

In p>1797, Eli Terry, an American, obtained a patent for a clock. He is regarded as the ancestor of American watch industry.

in p>184, British watchmaker bain invented the electric clock.

In p>1946, American physicist Dr. Libby figured out the principle of atomic clock. Two years later, the world's first atomic clock was created, and the atomic clock is still the most advanced clock. Its operation is completed by the natural vibration of cesium and ammonia atoms, and it can operate accurately within 3 years with very small error.

from 18th to 19th century, watch manufacturing industry gradually implemented industrial production.

in the 2th century, it began to enter the period of Shi Ying.